Close up of map lichen Rhizocarpon petraeum on a granite stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
Granite stone with saxicolous crustose lichens near the lake south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
Mexican yolk lichen (Candelina submexicana) together with granite rosette lichen (Physcia halei) at the edge of a granite stone in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Golden crustose lichen Caloplaca aurantia on a stone in desert near industrial zone of Ras Laffan, north from Doha. Qatar, March 23, 2013
Firedot lichen Xanthocarpia crenulatella (Caloplaca crenulatella) on erosion control stones in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
Circular patterns of map lichen Rhizocarpon petraeum on a granite stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
Various saxicolous crustose lichens on a granite stone near the lake near old army bathhouse south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
Lichens on stone roses in City Cemetery. Bryan, Texas, December 15, 2012
Golden lichen on stones near Jabal Al Jassasiya, on north-eastern coast. Qatar, December 26, 2015
Black and orabge lichens on a stone on a rocky ridge in Jabal Al Jassasiya site, on north-eastern coast. Qatar, December 26, 2015
Buellia subalbula (white with black apothecia) and other crustose lichens on stones on a rocky ridge of Jebel Fuwairit. Northern Qatar, March 12, 2016
Orange-brown disks of fruiting bodies (apothecia) of crustose lichen Caloplaca aurantia a stone in desert near industrial zone of Ras Laffan, north from Doha. Qatar, March 23, 2013
Crazy-paving pattern in the center of crustose lichen Caloplaca aurantia on a stone in desert near industrial zone of Ras Laffan, north from Doha. Qatar, March 23, 2013
Patch of rounded crustose lichen Caloplaca aurantia on a stone in desert near industrial zone of Ras Laffan, north from Doha. Qatar, March 23, 2013
Firedot lichen Fulgogasparrea brouardii (Caloplaca brouardii)(?) on granite stone in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Large granite stone covered by cracked lichen Acarospora novomexicana (yellow) and firedot lichen Fulgogasparrea appressa (Caloplaca appressa)(?) (red) on Freshman Mountain in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Round patch of Caloplaca aurantia lichen on a stone in desert near industrial zone of Ras Laffan, north from Doha. Qatar, March 23, 2013
Firedot lichen Caloplaca on granite stone in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
A stone with golden lichen on Cliff Walk near Rough Point. Newport, Rhode Island, March 15, 2003.
Yellow crustose lichen Caloplaca aurantia on a stone in desert near industrial zone of Ras Laffan, north from Doha. Qatar, March 23, 2013
Crustose lichens on stones on Fuwairit Hills (Jabal Fuwayrith), on north-eastern coast. Qatar, November 1, 2014
Buellia subalbula (white with black apothecia) and other crustose lichens on a stone of rocky ridge of Jebel Fuwairit. Northern Qatar, December 12, 2014
Caloplaca aurantia lichen on a stone on a rocky ridge of Jebel Fuwairit. Northern Qatar, March 20, 2015
Yellow lichen on stones on a rocky ridge in Jabal Al Jassasiya site, on north-eastern coast. Qatar, December 26, 2015
Dog lichen (Peltigera membranacea) on a stone in Lomonosov (Oranienbaum). West from Saint Petersburg, Russia, October 11, 2016
Caloplaca (orange) lichen on a roadside stone on north shore of Lake Somerville near Birch Creek Unit of Somerville Lake State Park. Texas, April 15, 2018
Stone flowers with orange lichens in City Cemetery. Bryan, Texas, December 8, 2018
Various lichens on a granite stone in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Isidious lichen Fulgogasparrea brouardii (Caloplaca brouardii)(?) on a granite stone in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Firedot lichen (Caloplaca) on stones for road erosion control in Washington-on-the-Brazos State Historic Site. Washington, Texas, January 23, 2019
Peltigera lichen on a mossy stone near Lisiy Nos, west from Saint Petersburg. Russia, May 6, 2019
Saxicolous lichen Lecidea lapicida(?) on a stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
Some grey crustose lichen on a stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
Salted shield lichen (crottle, Parmelia saxatilis) on a stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
Collema lichen on a stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
Long rope-like rhizines of dog lichen (Peltigera membranacea) on a mossy stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
Peppered rock tripe lichen (Umbilicaria deusta) on a stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
Map lichen Rhizocarpon petraeum on a roadside stone in a forest in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
Texture of map lichen Rhizocarpon petraeum on a granite stone in Zakhodskoe (Lounatjoki), 50 miles north from Saint Petersburg. Russia, May 9, 2019
Blue-gray rosette lichen Physcia caesia on a granite stone in dunes near the lake south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
Texture of blue-gray rosette lichen Physcia caesia on a granite stone in dunes near the lake south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
Close up of blue-gray rosette lichen Physcia caesia on a granite stone in dunes near the lake south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
Salted shield lichen (crottle, Parmelia saxatilis) on a granite stone in dunes near the lake south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
Grey folios lichen on a granite stone near the gulf in Sobstvennaya Dacha Park. Old Peterhof, west from Saint Petersburg, Russia, May 17, 2019
Close up of grey folios lichen on a granite stone near the gulf in Sobstvennaya Dacha Park. Old Peterhof, west from Saint Petersburg, Russia, May 17, 2019
Golden eye lichen (Teloschistes chrysophthalmus) on a stone chest of Virgin Mary statue in Washington Cemetery. Washington, Texas, December 8, 2019
Chiseled sunken disk lichen (Circinaria contorta, Aspicilia contorta) on remains of a concrete foundation at the base of stone pillars in Old Baylor Park. Independence, Texas, March 2, 2020
Buellia(?) lichen on a stone in a forest in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, May 25, 2019
Black apothecia of Buellia(?) lichen on a stone in a forest in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, May 25, 2019
Rock foam lichen (Stereocaulon saxatile)(?) on a rough surface of a granite stone in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, May 25, 2019
Gray-orange disk lichen (Lecidea lapicida)(?) on a stone in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, May 25, 2019
Rock foam lichen (Stereocaulon saxatile) with other lichens on a large granite stone in a forest in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, May 25, 2019
Stone statue of Virgin Mary with fruticose lichens in Washington Cemetery. Washington, Texas, December 8, 2019
Dark brown powdery lichen on a stone at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, December 21, 2019
Salted rock-shield lichen (Xanthoparmelia mexicana) or may be other Xanthoparmelia on an exposed flint stone in open area near pine and oak forest in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Texture of salted rock-shield lichen (Xanthoparmelia mexicana) or may be other Xanthoparmelia on an exposed flint stone in open area in a forest in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Details of salted rock-shield lichen (Xanthoparmelia mexicana) or may be other Xanthoparmelia on an exposed flint stone in open area in a forest in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Salted rock-shield lichen (Xanthoparmelia mexicana) or may be other Xanthoparmelia growing on an exposed flint stone in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Close-up of salted rock-shield lichen (Xanthoparmelia mexicana) or may be other Xanthoparmelia on an exposed flint stone in open area in a forest in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Salted rock-shield lichen (Xanthoparmelia mexicana) or may be other Xanthoparmelia on an exposed flint stone on rocky soil in sunny area near a forest in McKinney Roughs Nature Park near Austin. Texas, March 17, 2021
Salted shell lichen (Coccocarpia palmicola) on a stone in an oak forest at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, December 20, 2021
